Procedure when service cannot be effected as before provided (Section 65) -
If service cannot by the exercise of due diligence be effected as provided in section 62, section 63, or section 64, the serving officer shall affix one of the duplicates of the summons to some conspicuous part of the house or homestead in which the person summoned ordinarily resides; and thereupon the Court, after making such inquiries as it thinks fit, may either declare that the summons has been duly served or order fresh service in such manner as it considers proper.

The service of summons on a witness can also be done by post. As per Section 69 -
(1) Notwithstanding anything contained in the preceding sections of this Chapter, a Court issuing a summons to a witness may, in addition to and simultaneously with the issue of such summons, direct a copy of the summons to be served by registered post addressed to the witness at the place where he ordinarily resides or carries on business or personally works for gain.
(2) When an acknowledgment purporting to be signed by the witness or an endorsement purporting to be made by a postal employee that the witness refused to take delivery of the summons has been received, the Court issuing the summons may declare that the summons has been duly served.

My wife has sent notice through the family court, Nagpur by Regd Post with AD to my residence at goa. But I have not taken it and I told to postman to put a remark that "Door found lock". Accordingly postman sent the said notice back to sender i.e. to the Family Court after writting the above said remarks on the evelope.

Kindly advice me whether the court can take ex-partee decision on the petiotion filled by my wife at family court, nagpur Or what action will taken by Court in the above situation.